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Old 03-16-2007, 08:42 AM   #1
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Default Engine tuning

hey guys,

now this is probly the worst question to you experts out there but i havent tuned an engine for quite some time, the high speed needle which way do you turn to open it clockwise or counter clockwise?

thanks
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Old 03-16-2007, 09:05 AM   #2
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Rich is counterclockwise
Lean is clockwise
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Old 03-18-2007, 11:56 PM   #3
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hi! i'm using os 12tz p5 engine and have finished break-in. i've ran the car in the track, and after running the straights, i notice the engine would stay rev a bit higher than idle for 5-10 seconds after i release the throttle. my needle settings is still rich on the HSN and flush on the LSN.
i know its not the serv0-carb linkage as i've checked and it closes everytime i release the throttle.
anyone happen to know how to remedy this?
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Old 03-19-2007, 05:20 AM   #4
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Quote:
Originally Posted by RevMaxx
hi! i'm using os 12tz p5 engine and have finished break-in. i've ran the car in the track, and after running the straights, i notice the engine would stay rev a bit higher than idle for 5-10 seconds after i release the throttle. my needle settings is still rich on the HSN and flush on the LSN.
i know its not the serv0-carb linkage as i've checked and it closes everytime i release the throttle.
anyone happen to know how to remedy this?
I would recommend reading the article by Ron Paris...very informative.
It sounds like the idle screw is in to far and the bottem end screw is rich giving you a "false" idle.

http://www.tsrcar.com/garage/paddock/engine_tips.pdf

Doug
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Old 03-19-2007, 06:09 AM   #5
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Quote:
Originally Posted by flack
I would recommend reading the article by Ron Paris...very informative.
It sounds like the idle screw is in to far and the bottem end screw is rich giving you a "false" idle.

http://www.tsrcar.com/garage/paddock/engine_tips.pdf

Doug

thanks dough, got a reading and testing to do. you're right, article is very informative..
thanks again...
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Old 03-19-2007, 08:13 PM   #6
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Quote:
Originally Posted by RevMaxx
hi! i'm using os 12tz p5 engine and have finished break-in. i've ran the car in the track, and after running the straights, i notice the engine would stay rev a bit higher than idle for 5-10 seconds after i release the throttle. my needle settings is still rich on the HSN and flush on the LSN.
i know its not the serv0-carb linkage as i've checked and it closes everytime i release the throttle.
anyone happen to know how to remedy this?
usually this happen your tuning on high-end is richer then your low-end.

lean abit on high-end or rich a bit on low-end.

this 5-10 second will reduce.
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Old 03-20-2007, 08:01 PM   #7
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Quote:
Originally Posted by thamjk
usually this happen your tuning on high-end is richer then your low-end.

lean abit on high-end or rich a bit on low-end.

this 5-10 second will reduce.
the article flack mentioned really helped. i ultimately found out i was on "false idle" as my carb idle opening was more than what was required yet the idle was OK. i've notice before i change the carb setting that no matter how i richen the low end, it would still rev high after releasing the throttle from WOT.
will test the tuning more this weekend...

thanks again flack
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Old 03-20-2007, 08:19 PM   #8
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Quote:
Originally Posted by RevMaxx
the article flack mentioned really helped. i ultimately found out i was on "false idle" as my carb idle opening was more than what was required yet the idle was OK. i've notice before i change the carb setting that no matter how i richen the low end, it would still rev high after releasing the throttle from WOT.
will test the tuning more this weekend...

thanks again flack
ok then. its good you found it at your own.
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